SDF-3 Pioneer
SDF3 may refer to: * Spatial data file 3, a geodatabase file format * ''SDF-3 Pioneer'', a fictional spacecraft This is a list of fictional spacecraft, starships and exo-atmospheric vessels that have been identified by name in notable published works of fiction. The term "spacecraft" is mainly used to refer to spacecraft that are real or conceived using pres ...

Spatial Data File
The Spatial Data File (SDF) is a single-user geodatabase file format developed by Autodesk. The file format is the native spatial data storage format for Autodesk GIS programs MapGuide and AutoCAD Map 3D. SDF format version SDF3 (based on SQLite3) uses a single file. Prior versions of the format required a ''spatial index file'' (SIF), with an optional ''key index file'' (KIF) to speed access to the file. The SDF file format can be created and manipulated using an OSGeo FDO Provider for SDF, which is open-source software Open-source software (OSS) is computer software that is released under a license in which the copyright holder grants users the rights to use, study, change, and distribute the software and its source code to anyone and for any purpose. Ope .... Beyond Autodesk's products, products that can read/write the format include FME from Safe Software, Fdo2Fdo, and the FdoToolbox. The SDF format design uses low-level storage components of SQLite using a flat ...
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